Drug and alcohol policy for professional drivers

A driver impaired by drink or drugs behind the wheel of a heavy vehicle is a danger to everyone, and an operator who has done nothing to prevent it is exposed - to prosecution, to a civil claim, and to the Traffic Commissioner. A clear drug and alcohol policy is both a safety measure and evidence that you take the risk seriously.

Why a written policy matters

There is no substitute for a documented policy that every driver has seen and signed. It sets the standard, explains the consequences, and - crucially - is the evidence that the operator managed the risk rather than ignored it. After an incident, "we expect drivers to be sober" is worth far less than a signed policy and a testing record.

What a policy usually covers

• The standard - zero tolerance for driving while impaired, and clarity that this includes the morning-after and certain prescription and over-the-counter medicines.
• Testing - the circumstances in which testing happens: pre-employment, random, with-cause (where impairment is suspected) and post-incident.
• Consequences - what happens on a positive test or a refusal, applied consistently.
• Support - a route for a driver to disclose a problem and get help without an automatic ending, where appropriate.

The legal backdrop

Drink and drug driving limits apply to all drivers, with drug driving covering both illegal drugs and certain prescription medicines above set limits. For professional drivers the reputational and licensing stakes are higher: a conviction damages the driver's entitlement and can damage the operator's good repute, feeding into the kind of concerns that lead to a public inquiry.

Apply it to everyone who drives for you

The policy should reach agency and temporary drivers too - they drive your vehicles under your licence, so they operate to your standard.

How OperatorCompliance helps

OperatorCompliance keeps driver documents and policy acknowledgements with each driver's record, so a signed drug-and-alcohol policy and any testing evidence live alongside their licence, CPC and medical - one place, retrievable when it matters. See how it works or start a free 14-day trial.

This guide is general information, not legal advice. Check the current drink and drug driving law on GOV.UK and take HR/legal advice on testing.

Frequently asked questions

Do operators have to have a drug and alcohol policy?

There is no single law that names a written policy, but operators have a duty to run vehicles safely and to protect their good repute. A documented policy that every driver has seen and signed is the practical way to meet that duty and, after an incident, the evidence that you managed the risk rather than ignored it.

Can employers drug and alcohol test drivers?

Employers can operate testing where the contract and policy provide for it, commonly pre-employment, random, with-cause where impairment is suspected, and post-incident. Testing touches employment law and data protection, so take HR and legal advice on how it is run, and apply the consequences consistently to every driver.

What are the drink and drug driving limits?

Drink-driving limits apply to all drivers, and drug-driving law covers both illegal drugs and certain prescription medicines above set limits. For professional drivers the stakes are higher: a conviction damages the driver's entitlement and can damage the operator's good repute. Policies should make clear this includes the morning after and some medicines.

Does the policy apply to agency drivers?

Yes. Agency and temporary drivers drive your vehicles under your operator's licence, so they operate to your standard. Make sure the drug and alcohol policy reaches them, that they acknowledge it, and that any testing regime applies to them too. A gap here is a weakness that undermines the whole policy.

Sources

• Drug driving law
• The drink drive limit